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[OpenMP][Offloading] Add a CMake argument LIBOMPTARGET_LIT_ARGS to control behavior of libomptarget lit test 

By default, `lit` uses all threads to invoke tests, which  can easily cause out
of memory on GPUs because most of OpenMP offloading test usually take about 1GB
GPU memory, but a typical GPU only has 4-8GB memory. This patch introduce a
CMake argument `LIBOMPTARGET_LIT_ARGS` to allow users to control the behavior of
`libomptarget` tests, similar to `LLVM_LIT_ARGS`.

Reviewed By: JonChesterfield

Differential Revision: https://reviews.llvm.org/D106236
This commit is contained in:
Shilei Tian 2021-07-18 13:16:03 -04:00
parent 1b61d837b9
commit 954711ed8f
2 changed files with 17 additions and 2 deletions
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6
openmp/README.rst
View File

@ -300,6 +300,12 @@ Options for ``NVPTX device RTL``
**LIBOMPTARGET_NVPTX_DEBUG** = ``OFF|ON``
Enable printing of debug messages from the NVPTX device RTL.
**LIBOMPTARGET_LIT_ARGS** = ``""``
Arguments given to lit. ``make check-libomptarget`` and
``make check-libomptarget-*`` are affected. For example, use
``LIBOMPTARGET_LIT_ARGS="-j4"`` to force ``lit`` to start only four parallel
jobs instead of by default the number of threads in the system.
Example Usages of CMake
=======================

13
openmp/libomptarget/test/CMakeLists.txt
View File

@ -15,7 +15,11 @@ endif()
string(REGEX MATCHALL "([^\ ]+\ |[^\ ]+$)" SYSTEM_TARGETS "${LIBOMPTARGET_SYSTEM_TARGETS}")
foreach(CURRENT_TARGET IN LISTS SYSTEM_TARGETS)
string(STRIP "${CURRENT_TARGET}" CURRENT_TARGET)
add_openmp_testsuite(check-libomptarget-${CURRENT_TARGET} "Running libomptarget tests" ${CMAKE_CURRENT_BINARY_DIR}/${CURRENT_TARGET} DEPENDS omptarget omp ${LIBOMPTARGET_TESTED_PLUGINS})
add_openmp_testsuite(check-libomptarget-${CURRENT_TARGET}
"Running libomptarget tests"
${CMAKE_CURRENT_BINARY_DIR}/${CURRENT_TARGET}
DEPENDS omptarget omp ${LIBOMPTARGET_TESTED_PLUGINS}
ARGS ${LIBOMPTARGET_LIT_ARGS})
list(APPEND LIBOMPTARGET_LIT_TESTSUITES ${CMAKE_CURRENT_BINARY_DIR}/${CURRENT_TARGET})
# Configure the lit.site.cfg.in file
@ -24,4 +28,9 @@ foreach(CURRENT_TARGET IN LISTS SYSTEM_TARGETS)
configure_file(lit.site.cfg.in ${CURRENT_TARGET}/lit.site.cfg @ONLY)
endforeach()
add_openmp_testsuite(check-libomptarget "Running libomptarget tests" ${LIBOMPTARGET_LIT_TESTSUITES} EXCLUDE_FROM_CHECK_ALL DEPENDS omptarget omp ${LIBOMPTARGET_TESTED_PLUGINS})
add_openmp_testsuite(check-libomptarget
"Running libomptarget tests"
${LIBOMPTARGET_LIT_TESTSUITES}
EXCLUDE_FROM_CHECK_ALL
DEPENDS omptarget omp ${LIBOMPTARGET_TESTED_PLUGINS}
ARGS ${LIBOMPTARGET_LIT_ARGS})